package com.xbb.config;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class JwtConfig {
    final static String secret="xiebingbing"; //私钥
    final static long expire=3600; //失效时间

    /*
     * 根据身份ID标识，生成Token
     */
    public String getToken(String identityId) {
        Date nowDate = new Date();
        // 过期时间
        Date expireDate = new Date(nowDate.getTime() + expire * 1000);
        return Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setSubject(identityId)
                .setIssuedAt(nowDate)
                .setExpiration(expireDate)
                .signWith(SignatureAlgorithm.HS512, secret).compact();
    }

    /*
     * 获取 Token 中注册信息
     */
    public Claims getTokenClaim(String token) {
        try {
            return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /*
     * Token 是否过期验证--验证Token
     */
    public boolean isTokenExpired(Date expirationTime) {
        return expirationTime.before(new Date());
    }
}
